Locking of removable joint-pins, hinge-pins, coupling-pins, and the like



E. MEPSTED. LOCKING 0F REMOVABLE JOINT PINS, HINGE PINS, COUPLING PINS,AND THE LIKE.

I APPLICATION FILED MAR. 25. I919- 1,372,242. Patented Mar. 22, 1921.

UNITED STATES PATENT OFFICE.

ERNEST MEPSTED, on PIENTONVILLE, LONDON, ENGLAND.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed March 25, 1919. Serial No. 285,130.

To all whom it may concern:

Be it known that LERNEST Mnrs'rnn, engineer, a subject of the King ofGreat Britaln and Ireland, (whose post-oflice address is 3234 Rodneystreet, Pentonville, London, N. 1, England,) have invented certain newand useful Improvements in the Lockin of Removable Joint-Pins,Hinge-Pins, 0upling-Pins, and the like, of which the folowing is aspecification.

This invention relates to the lockin or securing of removable jointpins, hmge pins, coupling pins, fastening pins and the like employed toconnect parts which require to be quickly separated or assembled and hasfor its object to provide a locking pin for the purpose aforesaid havingpositive lockin means adapted when in the locking posltion to preventthe pin from working out or moving endwise, but permitting of the quickrelease and removal of the pin without the aid of tools.

According to this invention a movable member is mounted to slide axiallyon or in the pin at the head end thereof and pressed outward by a springwhile a locking device is connected with said movable member andoperated thereby to secure or release the pin.

In one form of construction the locking means is capable of beinmanipulated from the'head end of the pin Iiut effects the looking at theoppositeend where a radial head, projection or stop forming the lockingmember proper can be caused to project at right angles to the shank ofthe in to a sufficient extent to secure the pm in position or can bemoved into an inoperative posi of the same.

In the form of the invention is shown a cylindrical pin a formed with ahead I) at one end and a transverse groove a at the other end. The pin ais bored eccentrically form end to end to receive a pin Z of,

a smaller diameter whichis inserted in the bore and secured at one end1n a circular head, milled cap, or socket piece at arranged to fit andslide over an annular flange or '2 socket n on the head of the main pinand to cooperate therewith to inclose a. helical compression spring 6'placed on the end of the eccentrically disposed pin Zlbetween the head 6of the main pin and the cap or socket piece m.

A its opposite end the eccentrically mounted pin Z has an integral gib 0or similar head shaped to fit the transverse groove (1' in the adjacentend of the main pin in which it is normally held by the reaction ofdthecompression spring 6 at the other en This gib 0 or similar head formsthe looking member proper, the transverse groove a in which it fitsbeing so disposed across the end of the main pin and the radialdimension of the gib head being such that when set one way in the grooveit projects a suflicient distance radially to lock the main pin as shownin Fig. 2 and when turned through an angle of one hundred and eightydegrees and set the opposite way in the groove it no'longer pro ectsradially from the main pin or looks it, this position corresponding withthe maximum radial dis tance between the axis of the eccentric bore andthe circumference of the main pin which is as great as or greater thanthe radial length of the locking head. a

In order to change the positions of the locking member the head or capwith the pin to force thegib 0 out of the groove a allowing the pin 1 tobe turned through the required angle.

I claim:

1. A pin with locking means as set forth comprising a spring pressedmovable head mounted on an extension on the fixed head. of the pin and alocking member secured to the movable head at one end and extendingthrough an eccentric bore in the pin, its

opposite end terminating in a radial locking head, located in agroove'in the shank en of the pin and capable of being turnedinto alocking or release position substantially as described.

2. A 'pin locking device comprising a 5 movable head mounted on one endof the pin, a locking member located in an eccentric bore in the pin andconnected at one end with the movable head, a gib on the opposite end ofthe locking member, and means including a spring and a groove in 10 thepin for retaining the gib in the locked or unlocked position.

ERNEST MEPSTED.

